3rd starter this season on Force outboard 1999 120HP

rigasr

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Jul 11, 2011
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19
I am plagued with starter issues on my Force outboard 1999 120HP.
Last summer my orginal starter died (it would no longer have enough power to turn the motor). Decided to buy a new one instead of rebuilding it.

Got a new aftermarket one off ebay for about $80. Installed it and great, worked all last summer.

Last month, took the boat out for the 1st time this summer and after a few stops & starts on the lake, it all of a sudden started having a hard time turnign the motor. I thought it was the battery. Attached my portable battery booster and no luck. Got towed back to the ramp.
At home I determined it was the starter that I got a year before. I tracked down my receipts and saw I had 1 year warranty. It was exactly 1 year and I emailed the contact and they were great and shipped me a new one.

Got a new repalcement a week later and installed. Tested at home and it worked fine.
Took it onto the lake and problems started fairly soon. Sometimes the worm gear wouldnt shoot up to engage onto the ring gear. I checked the worm gear and it would get really stuck at the bottom of the shaft. I managed to manually free it (it was really stuck tight). After that I could start but it kept getting stuck and as a result it couldnt engage. It was oiled/lubed well though.
Went home, took out the starter and seems like a manufaturing fault. I could reproduce the worm gear getting stuck at its default position at home.
I emailed the company again and they said they will ship me another. Got the other one last week and installed and seemed to work great at home.
Went to the lake yesterday. It worked well for about 10 stop & go's. After about the 10th time the starter would no longer turn the motor. I took off the engine cover and saw the worm gear still engaged on the flywheel ring gear. It was very tight against the ring gear which is why it didnt want to drop. I had to move the flywheel with my hands to force the worm gear to drop. It kept getting stuck onto the flywheel when trying to start and was having a hard time to trun the motor.
Fortunatly I still had the previous starter with me, the one where the work gear would get stuck at the bottom position and wouldnt engage. I knew at least this one worked so I quickly swapped it out while on the lake.
When I tried starting, the ring gear came of the flywheel. What the heck! There was no way I could get the ring gear back on so was stranded again!

My questions:
1. Are these cheap after market starters inferior pieces of junk?
2. Am I doing somethign wrong when replacing the starter? I cant see that I am becuase there are only 2 nuts at the top and 1 with a braket to the side that mounts to the block.
3. When installing the starter, does it need to be alligned somehow? I dont see how that is possible as it fits quite snug with not much play.
4. How the heck could the ring gear come off the flywheel?
5. Should I bite the bullet and spend over $200 for a genuine mercury/force starter? If so, can anyone suggest where to buy one from at a decent price?

Sorry for the lengthly message, hope someone has some insight here.
 

JB

Honorary Moderator Emeritus
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Mar 25, 2001
Messages
45,907
Re: 3rd starter this season on Force outboard 1999 120HP

When a part appears to fail time after time it is usually a symptom, rather than a cause. You need to track down what is causing your starters to fail. It probably isn't the starters.

Repeatedly operating a series wound DC motor on less than full current will eventually destroy the motor.

I suspect that your battery wiring and it's connectors, and/or the solenoid, are killing your starters. Part of the current path is the mechanical connection of the starter motor to the engine block.

Confirm that your battery cables are sound, big enough for their length and connected through zero resistance connections. Zero, here means real zero; a few milli-ohms (unmeasurable with an ohmmeter) will prevent full current. Be sure that the electrical connection of the motor to the engine block is flawless, also. The only way to measure these resistances is by measuring voltage drop with full voltage applied to the circuit. There should be less than 1 volt drop between the battery and the starter hot lead with power applied. Yes, most circuits drop more than that, but we need to fix a problem, not pass an "okay" test.

I can't speak to the quality of the starters you have been buying, but if you have an OEM starter, get it rebuilt, rather than replacing it. A good pro starter/alternator shop can tell you if you have a top quality product or not.

Good luck, and let us know your progress. :)
 

pnwboat

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Joined
Oct 8, 2007
Messages
4,251
Re: 3rd starter this season on Force outboard 1999 120HP

1. Are these cheap after market starters inferior pieces of junk?
I've had good luck with starters from E-Bay, but I've also heard of others that haven't. Looks like the old story of "you get what you paid for" rings true in your case.

2. Am I doing something wrong when replacing the starter? I cant see that I am because there are only 2 nuts at the top and 1 with a bracket to the side that mounts to the block.
Just the two nuts and one bolt on the support bracket.

3. When installing the starter, does it need to be alligned somehow? I dont see how that is possible as it fits quite snug with not much play.
No alignment that I'm aware of.

4. How the heck could the ring gear come off the flywheel?
I've seen a few of these pop off. You can tack weld them back on and they work just fine. Replacement flywheel is expensive.

5. Should I bite the bullet and spend over $200 for a genuine mercury/force starter? If so, can anyone suggest where to buy one from at a decent price?
The quality of some of the low cost after market starters is probably questionable. Look for the ones advertising the ARCO starters and 99%+ satisfaction. You can usually find them for around $170.
 

rigasr

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Joined
Jul 11, 2011
Messages
19
Re: 3rd starter this season on Force outboard 1999 120HP

Thank you for the replies. I really dont think it is the battery, wiring or solenoid though. I still think its this cheap $70 starter that is just poorly manufacatured in China. Each one of the three (same manuf. starter) exhibited different symptoms. I however have to get another starter as the company will no longer send me another replacement starter, they are refunding me the $80 ($70 + $10 shipping) though. I will use this towards a hopefully 'better' starter that costs more $$. As pnwboat says, "you get what you pay for" so I am hoping this is it.

About the ring gear. Do I need to take off the flywheel to press the ring gear in place?
 

mla2ofus

Chief Petty Officer
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Dec 30, 2008
Messages
571
Re: 3rd starter this season on Force outboard 1999 120HP

When I first got my '98 Force 90HP 3 yrs ago the starter would have difficulty cranking the engine. After load testing the batt, checking ALL connections and taking voltage readings, I removed the starter. On disassembly I found the bushings were dry. Lubed them w/ good grease, reassembled and reinstalled starter. Haven't had any more trouble since.
Mike
 

jerrythedonkey

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Feb 17, 2011
Messages
1
Re: 3rd starter this season on Force outboard 1999 120HP

I really dont think it is the wiring

for what it costs, i would replace all the battery wiring and grounds. Can be done fairly cheap and (check ebay, there is a seller that does marine grade wiring and connectors) if you can measure/cut/crimp. doesnt take that long either.
 

JB

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45,907
Re: 3rd starter this season on Force outboard 1999 120HP

Thank you for the replies. I really dont think it is the battery, wiring or solenoid though.

Well, excuse me for wasting my time and yours. I didn't realize that you are expert on this matter and think if you keep throwing enough money at it you may eventually find the real trouble.

I will leave it to you.
 

pnwboat

Rear Admiral
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Oct 8, 2007
Messages
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Re: 3rd starter this season on Force outboard 1999 120HP

You don't absolutely have to take the flywheel off. I depends on the personal preference or expertise of whoever is doing the repair.
 

rigasr

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Jul 11, 2011
Messages
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Re: 3rd starter this season on Force outboard 1999 120HP

Heard back from the boat shop. Its absolutly the inferior cheap starters causing the issues. Everything else checks out perfect.
Unable to get the ring gear back on the flywheel with the flywheel on. They are however unable to take the flywheel off using a universal flywheel puller. It wont budge.
Waiting for the proper merc flywheel puller to arrive. This is the one that threads into the center of the flywheel and a stud through the middle. The one with the three bolts 120 degrees apart would not pull it off.
Have ordered a genuine merc starter, they dont come cheap. At least I am getting what I am paying for and getting a refund on the busted aftermarket ones.
 

pnwboat

Rear Admiral
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Oct 8, 2007
Messages
4,251
Re: 3rd starter this season on Force outboard 1999 120HP

There's a good chance that the three bolt puller will get it off if you do the following. Get 3 grade 8, 1/4 X 20 bolts. Make sure you thread them all the way down into the holes. Crank down on the center bolt as tight as you can get it. Take a hammer and hit the center bolt hard as though you were trying to drive down into the flywheel. Might take two or three hits, tighten the center bolt again and hit it again. The impact when you hit the center bolt will break the bond between the flywheel and crankshaft snout.
 

rigasr

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Joined
Jul 11, 2011
Messages
19
Re: 3rd starter this season on Force outboard 1999 120HP

An update here: My new genuine OEM starter arrived 2 weeks ago. Sent back the junk cheap starter and got a refund. Also got the correct flywheel puller.
Got the flywheel off with the propper puller. Heated up the gear ring and got it back on the flywheel and reinstalled the flywheel.
Installed the new starter. Have taken out the boat twice to the lake since then and the new genuine OEM brand starter is working great. Used the starter about 20 times each time on the lake, works wonderful.

I have searched and read a number of posts on this BB with folks having starter issues on some of the Force motors. All I want to say is stay away from the cheap $70 - $100 starters. They are junk, very poor quality inferior starters. Stay away from them and buy a genuine one. They cost more $$ but will save you on time and headaches and having to be towed back to the ramp.
 

fucawi

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May 18, 2011
Messages
1,039
Re: 3rd starter this season on Force outboard 1999 120HP

The only way you can burn out these starters is if they are under powered ..ie physically the same but the guts are not rated to produce sufficient power or if you continually operate it on too low a voltage . This would show as slow cranking ..if you can detect it going over each compression then you have a problem . You also mentioned that he pinion stuck in the ring gear ..pinion to ring gear mesh is a bit sloppy so if its too tight this will increase the load.. always wash the drive assy in parafin before use as it may have a protective coating on it from manufacture
 
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